This module, if activated, checks the pasted URLs in the create media / page
dialog of the admin. It will show an embed option for services like
YouTube, Vimeo or any other service which supports OEmbed.

A saved media resource has a thumbnail image which is downloaded from
the OEmbed service and embedded in the resource. Furthermore, the
resource’s medium record has an oembed field which contains the
full JSON response of the request. The oembed field looks like
this: